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February
The foam box is a box type packing container made of foam plastic (multi hollow plastic), and the plastic foam is a plastic with many tiny pores inside. EPS foamed plastic is a lightweight material made of foam material, which is made up of polystyrene resin, foaming agent and other auxiliary materials. It is an indispensable heat preservation and preservation material for seafood freezing, vegetable preservation, cold storage, railway passenger car and so on.
The effective shelf life is 3 months at the temperature below 25℃, however the ideal material should be used within 1 month from manufacturing. Once the package is unfolded, the blowing agent will be volatilized rapidly. EPS should be therefore used immediately after the bags opened to avoid the reduction of expansion ratio or losing effectiveness.
January
Polystyrene board (EPS) is a foam material with a closed-cell structure that is formed by foaming and molding with polystyrene resin as the main component. Extruded board (XPS) is a rigid foam material with closed-cell structure made by heating and extruding polystyrene resin or its copolymer as the main component, adding a small amount of additives.
The annual temperature difference of the inner wall of the outer wall is 5 times of that of the outer wall. The annual temperature difference of the outer leaf wall of the sandwich insulation structure is 8 times of that of the inner wall, and the outer wall of the self insulation wall is 8 times of the inner wall. Therefore, the methods of internal insulation, sandwich insulation and self insulation will reduce the stability of structural walls and shorten the life of structural walls.
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